function newsletter_check_email(email){
  // Reg exp
  var regexp = /^[\w-\.]{2,}@[\w-]{1,}\./;
  return regexp.test(email);
}


function newsletter_subscribe(url, error_wrong_email)
{		
	// Args
	var email = document.getElementById('newsletter').email.value;	
	var action = document.getElementById('newsletter').action[0].checked ? "subscribe" : "unsubscribe";
	
    // Stats
	pageTracker._trackPageview('/newsletter/'+action); 
	
	// Test e-mail
	if(!newsletter_check_email(email))
	{
		alert(error_wrong_email);
		return;
	}
	
	// Url
	url = url + "?email=" + email + "&action=" + action;
	window.open(url, "" , "location=0,menu=0,status=0,resizable=1");

}